Electric motor



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ELECTRIC MOTOR. No. 478,968. Patented July 12, 1892.

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ELECTRIC MOTOR. No. 478,968. -Patented July 12, 1892.

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No. 478,968. Patented July l2, 1892.

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HARLON F. ONG, OF NEVBERG, OREGON.

ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 478,968, dated July 12, 1892. Application filed April 4, 1891. Serial No. 387,588. (No model.)

T tZZ whom, t may concern.-

Be it known that I, HARLON FINLEY ONG, of N ewberg, in the county of Yam IIill and State of Oregon, have invented a new and Improved Electric Motor, of which the following is a speciiication, reference being had to the annexed drawings, forming a part thereof, in which- Figure l is a sectional end elevation of my improved motor. Fig. 2 is a perspective view of the armature and commutator of the motor. Fig. 3 is a side elevation of one of the armature-cores. Fig. 4 is an end view of a modiiied form of the armature. Fig. 5 is a side elevation of the core used in the armature shown in Fig. 4. Fig. 6 is a perspective view of the commutator belonging to the same. Fig. 7 is a plan view of the motor. Fig. 8 is a side elevation, partly in section. Fig. 9 is a detail View of the switch. Fig. l0 is a plan view of a modified form of the motor. Fig. 1l is an enlarged detail plan view of the switch, and Fig. 12 is a diagrammatic view of the circuit of the armature.

Similarletters and figures of reference indicate corresponding parts in all the views.

The object of my invention is to construct a simple and effective motor the power of which may be regulated and which may be easily reversed.

My invention consists in a compound fieldmagnet formed of a series of held-magnets furnished with separate polar extensions, a compound armature formed of a series of armatures arranged upon a shaft and correspending in position with the polar extensions of the field-magnets, and a switch adapted to control the flow of the current through the armature, all as will be hereinafter more fully described.

The compound held-magnet A is provided with an iron plate B,forming a yoke for each of the sections of the magnet. The said yoke is supported by plates O C of non-magnetic material, which are secured to the base D.

In the plate B are inserted the pole-pieces E E of the held-magnet sections F F F2 F3. The lower ends of the pole-pieces E E are curved in opposite directions to adapt them to the circumference of the armature G, and upon the pole-pieces, between the front curved ends and the plate B, are placed the coils a a. The coils of each section of the field-magnet are connected together in the usual manner by one terminal of each, and the remaining terminals of the section extend outwardly and are connected with the switch H in the manner presently to be described.

Upon the tubular shaft I of the armature G are mounted in the present case four armaturecores J, each having four equidistant radial arms I), upon which are placed coils c. The armature-shaft I is journaled upon screws (Z (Z, projecting through the brackets c c', Secured to the plates O O. Upon one end of the shaft I is secured a commutator K, and upon the opposite end of the shaft is secured a pulleyL for receiving a belt, by which power is communicated to the machinery to be driven. To the plate O are attached blocks ff of insulating material, to which are secured the commutator-brushes g g.

The commutator K consists of a pair of rings 7L h', mounted on a cylinder of insulating material, each ring being divided at diametrically-opposite points, the divisions of one part being arranged ninety degrees distant from those of the other part. The commutator springs or brushes g g touch both of the rings 7L h. Each series of coils c, arranged upon the same longitudinal line, are connected in series with each other and with the series of coils upon the diametrically-opposite side of the armature lying in the same plane. The terminals of these two series of coils is connected with the halves of one of the commutator-rings, and in like manner the other diametrically-opposite series of coils c are connected with each other and with the halves of the other commutator.

The switch I-I is provided with two series of contact-points M M', the group M having the points t' t" t2 Z3 k 7.3 7a2 7c3 Z Z Z2 Z3, and the group M is composed of the points m m m2 m3 fn a n2 a3 0 o 02 o3 p p p2 p3. The switcharm N, of insulating material, is pivoted at the center of the base of the switch H and is provided with two curved metallic segments q q',

which are capable of connecting in pairs four rows of contact-points of either group.

The current flows from the generator O through the Wire l to the point 2, where it divides, one portion thereof iowing over the wire 3 to the commutator-spring g through the commutator-cylinder to the two series of armature-coils in alternation, thence to the commutator-spring g', from which it dows back to the generator through the wires 4 and 5. The otherport-ion of the current iiows from the wire 1 to the point 2 through the wire 6 to the switch H, where the wire branches, one branch extending to each of the contact-points mm mz'ms.v The wire 6 is also connected electrically by the wire 7 and its branches with the contact-points Z Z Z2 Z3 of the switch H. The wire 8, connected with wire 5, is connected electrically with the points M t2 3 and also with the contact-points p 19192 193. Vhen the switch-arm N is moved so as to bring its segments q q into Contact with the points m n and o p, the current from the battery passes from the generator O through thewires l 6, point m, segment q, point n, through the section Fi1 of the field-magnet, then back to the point o', thence through the segment q and point p back to the generator through the wires 8 and 5, while another portion of the current is conveyed to and from the armature by the wires 3 and 4. When the switch is moved forward so as to make contact with the points m n and o p', the current fiows through two sections of the magnet in parallel, and so on throughout the whole series. When the switch-arm N is moved so as to bring the segments q q into contact with the points tj and Zr; Z of the group M, the current ows in the opposite direction through one section of the field-magnet, thereby reversing the direction of the rotation of the armature. When the switch-arm N is moved farther in the same direction, the segments q q are brought into contact with the points ftj and Zo Z', thereby sending the current through two sections of the field-magnet in parallel. By moving the switch-arm still farther the other sections of the field-magnet may be thrown into the circuit. By sending the current through a greater or smaller number of the sections of the field-magnet in Ithe manner described the power of the motor is regulated.

The switch, as shown in Fig. ll, is provided with two series of contactfpoints M and M, the group M having the points t t t2 t3 u, u M2153, and the group M is composed of the point-s r r r2 r3 s s s2 s3. The switch-arm N, of insulating material, is pivoted at the center of the base of the switch and is provided with two metallic plates q2 Q3, one on either side of the pivot, one of which is capable of connecting any two points of either group M or M and the other is capable of connecting the segments 'w w or o fu', according to the direction in which the lever is moved. One pole of the battery is connected electrically with the commutator-brush g and the other commutator-brush'g is connected with the contact-points t t t2 t3, also with segment Q2 of the series M. The other pole of the battery is connected electrically with the contact-points r r r2 r3; also with the segment w of series M. One terminal of the fieldmagnet is connected electrically with the segments o and w and the other terminal of the held-magnet is connected with the contact-points s3 and a3. One terminal of the section F of the field-magnet and one terminal of the section F are connected together and electrically with the contact-points u and s. The other terminal of the section F of the field-magnet and one terminal of the section F2 are connected together and electrically with the contact-points s and u. The other terminal of the section F2 of the field-magnet and one terminal of section F3 are connected together and electrically with the contact-points u2 and s2. The other terminal of the section F3 of the field-magnet is connected electrically with the points s3 and as, thus completing the circuit. If the lever N be moved to the right so as to bring its plate q2 in contact with the segments w and w and its plate g3 1n contact with the points t and u, the current from the battery passes in one direction through onesection of the held-magnet. Vhen the lever is moved forward so as to make contact with the points t and u', the current flows through two sections of the held-magnet in the same direction, and so on throughout the whole series. Vhen the switch-arm N is moved so as to bring the plate q2 in contact with the segments o and t" of the group M and the plate Q3 in contact with the points r and s of the group M, the current flows in the opposite direction through one section of the field-magnet, thereby reversing the direction of the rotation of the armature. When the switch-arm N is moved farther in the same direction, the plate g3 will be brought into contact with the points r and s', thereby sending the current through two sections of the field-magnet in the same direction. By moving the switch-arm still farther the other sections of the held-magnet may be thrown into the circuit. By sending the current through greater or smaller number of the sections of the field-magnet in the manner described the power of the motor is regulated.

Having thus described my invention, I claim as new and desire to secure by Letters Patentn 1. In an`electric motor, a series of armature-sections connected in parallel, a commutator connected electrically with the armature-sections formed of two rings, each divided at diametrically-opposite points, with the divisions of one-half arranged ninety degrees distant from those of the other part, and a pair of commutator-brushes held in contact with both of the commutator-rings, substantially as specified.

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2. In an electric motor, the combination tions in either direction, substantially as of an armature formed of a number of seospecified. tions and provided with aoominutator, afieldmagnet formed of a number of sections oor- 5 responding with those of the armature, and W'inesses:

a multiple switch for sending the current J. N. SMITH, through one or more of the field-magnet see- A. XV. COOK.

H. F. ONG. 

